//#include <iostream>
//#include <algorithm>
//#include <vector>
//#include <cmath>
//#include <functional>
//#include <climits>
//#include <cstring>
//#include <unordered_map>
//#include <unordered_set>
//#include <map>
//#include <set>
//#include <queue>
//#include <stack>
//#include <deque>
//
//#define quickio ios::sync_with_stdio(false),cin.tie(0),cout.tie(0);
//#define endl "\n"
//
//using namespace std;
//typedef long long ll;
//
//int solve(int n)
//{
//	if (n <= 2)
//		return 1;
//	return solve(n - 1) + solve(n - 2);
//}
//
//int main()
//{
//	int n;
//	cin >> n;
//	cout << solve(n) << endl;
//	return 0;
//}